java判断时间为上午 中午 下午 晚上 凌晨

public static void main(String[] args) {Date date = new Date();SimpleDateFormat df = new SimpleDateFormat("HH");String str = df.format(date);int a = Integer.parseInt(str);if (a >= 0 && a <= 6) {System.out.println("凌晨");}if (a > 6 && a <= 12) {System.out.println("上午");}if (a > 12 && a <= 13) {System.out.println("中午");}if (a > 13 && a <= 18) {System.out.println("下午");}if (a > 18 && a <= 24) {System.out.println("晚上");}}